Anchor base for heat sink of IC chipset

ABSTRACT

An anchor base for heat sink of IC chipset is formed basically in a rectangular frame comprising: two lateral plates respectively formed at the bottom of the two opposite lateral stiles of the rectangular frame, each of the two opposite lateral plates having respective snap barb at its lower portion; a longitudinal resilient rod striding the rest two opposite lateral stiles of the rectangular frame, wherein two ends of the longitudinal resilient rod are extended downwardly to form a pair of protruding rods which are no shorter than the height of the lateral plates; a shorter resilient rod crossing the longitudinal resilient rod, wherein a protrusion is formed on each of two ends of the shorter resilient rod at a lower position. When pairing the anchor base to the heat sink, it would need no extra perforation or planing process and the shorter resilient rod avails the deformation torque of the longitudinal resilient rod so as to enhance pressure of the shorter resilient rod onto the heat sink for a close attachment of the heat sink to the chipset.

FIELD OF THE INVENTION

[0001] This invention relates generally to an anchor base for heat sink of IC chipset, particularly to an anchor base made to fit in precisely with a heat sink and a chipset in order to heighten heat-dissipation efficiency of the heat sink.

BACKGROUND OF THE INVENTION

[0002] An anchor base is usually implemented to facilitate close attachment of a heat sink onto an IC chipset to efficiently disperse heat created so as to cool down and keep the chipset under normal conditions, particularly during high-speed operation.

[0003] The application No. 88211752 of R.O.C Taiwan discloses an anchor base in form of a rectangular frame is extended downwardly from its two opposite lateral stiles to form respective lateral plates, wherein a protruding snap barb is arranged on the inner face of each lateral plate at its lower portion; the other two opposite stiles of the anchor base are extended downwardly to form respective protruding rods which are equal or longer than the height of the lateral plates; and a plurality of resilient rods are formed on the inner wall of the rectangular frame, and a projecting portion is arranged at a lower part of each of the resilient rods.

[0004] Whereas a heat sink must be perforated or planed to form holes or slots before being locked to the anchor base, the heat-dissipation efficiency is usually lowered because of lessening of the heat sink surface. For remedy, the pressure of a projecting portion of the resilient rods applied onto the heat sink better be enhanced.

SUMMARY OF THE INVENTION

[0005] The primary object of this invention is to provide an anchor base for heat sink of IC chipset, characterized in: at least one longitudinal resilient rod longer than a heat sink being provided to the anchor base to thereby waive of extra processing of the heat sink; and further characterized by a relatively shorter resilient rod for enlarging deformation torque of the longitudinal resilient rod so that two protrusions of the shorter resilient rod can press the heat sink more closely to heighten heat-dissipation efficiency and shorten the conventional process procedure.

[0006] In order to realize abovesaid object, the anchor base for heat sink of IC chipset is formed basically in a rectangular frame comprising: two lateral plates respectively formed at the bottom of two opposite lateral stiles of the rectangular frame, each of the two opposite lateral plates having respective snap barb at its lower portion; a longitudinal resilient rod striding the rest two opposite lateral stiles of the rectangular frame, wherein two ends of the longitudinal resilient rod are extended downwardly to form a pair of protruding rods which are no shorter than the height of the lateral plates; a relatively shorter resilient rod crossing the longitudinal resilient rod, wherein a protrusion is formed on each of two ends of the shorter resilient rod at a lower position. Hence, when pairing the anchor base to the heat sink, it would need no extra perforation or planing process and the shorter resilient rod avails the deformation torque of the longitudinal resilient rod so as to enhance pressure of the shorter resilient rod onto the heat sink for a close attachment of the heat sink to the chipset.

[0007] For more detailed information regarding advantages or features of this invention, at least an example of preferred embodiment will be elucidated below with reference to the annexed drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The related drawings in connection with the detailed description of this invention, which is to be made later, are described briefly as follows, in which:

[0009]FIG. 1 is a schematic view of an anchor base of this invention in three dimensions;

[0010]FIG. 2 is an exploded view showing combination of a heat sink, a chipset, and the anchor base of this invention in three dimensions;

[0011]FIG. 3 is a front view of cutaway section of the combined heat sink, chipset, and anchor base of this invention; and

[0012]FIG. 4 is a side view of cutaway section of the combined heat sink, chipset, and anchor base of this invention.

DETAILED DESCRIPTION OF THE INVENTION

[0013] According to a preferred embodiment of this invention shown in FIG. 1, an anchor base 1 for heat sink of IC chipset in form of a rectangular frame is provided with a rectangular blank 10 in center, wherein the rectangular frame is extended downwardly from its two opposite lateral stiles to form respective lateral plates 11. A protruding snap barb 12 is formed inwardly on each lateral plate 11 at its lower edge, and a longitudinal resilient rod 13 strides the rest two opposite lateral stiles, wherein both ends of the resilient rod 13 are extended downwardly to form respective protruding rods 14 such that the length in-between is longer than that of two opposite edges of a heat sink 2; the height of the protruding rod 14 is no shorter than that of the lateral plate 11; and in the rectangular frame, a relatively shorter resilient rod 15 is arranged perpendicular to the resilient rod 13, which, the shorter resilient rod 15, is extended at both ends downwardly to form respective protrusions 16.

[0014] Referring to FIG. 2, the heat sink 2 for pairing with the anchor base 1 contains a board 21 having a plurality of fins 22 extended upwardly thereon. The space between two adjacent fins 22 is capable of accommodating: the lateral stiles of the anchor base 1 (excluding the lateral plates 11), the longitudinal resilient rod 13 (excluding the protruding rods 14), the shorter resilient rod 15 and a plurality of longitudinal channels 23 and latitudinal channels 24.

[0015] An average chipset 3 soldered on a PCB 4 is provided with a plurality of pins having a height of 0.25 mm above the PCB 4 approximately. When assembling, an operator may hold the heat sink 2 and let its fins 22 pass through the blank 10 of the anchor base 1 from bottom to top, such that the board 21 blocks those two lateral stiles other than the stiles of the lateral plates 11 of the blank 10 to have them and the shorter resilient rod 15 stayed in the longitudinal channels 23 while the longitudinal resilient rod 13 in the latitudinal channels 24 or vice versa. The operator is supposed then to depress the snap barbs 12 of the lateral plates 11 and snap the same at two corresponding lateral edges 31 of the chipset 3 so that the protruding rods 14 would bear a torque created by a reaction force from the PCB 4 that results in a bend of the resilient rod 13 to prop the protrusions 16 of the shorter resilient rod 15 closely against the heat sink 2 and combine the heat sink 2 together with the chipset 3 rapidly as indicated in FIGS. 3 and 4. On the contrary when detachment of the heat sink 2 is desired, all an operator has to do is to pull the anchor base 1 upwardly until the barbs 12 escape from the chipset 3.

[0016] According to the abovesaid, the anchor base of this invention is considered advantageous in lowering production cost and merited in the following:

[0017]1. In combining the anchor base 1 with the heat sink 2, there is no need of further perforation or planing of the heat sink 2 that would influence heat dissipation efficiency of the heat sink rarely and shorten the process procedure.

[0018]2. As the shorter resilient rod 15 is properly located in the rectangular frame to enlarge the deformation torque of the longitudinal resilient rod 13 and to thereby enhance the pressure applied onto the protrusions 16 by both ends of the shorter resilient rod 15 such that the heat sink 2 can be attached closely to the chipset 3 for waiving of any undesirable gap created among the anchor base 1, the heat sink 2, and the chipset 3 so that the heat dissipation rate of the heat sink 2 can be heightened.

[0019] In the above described, at least one preferred embodiment has been described in detail with reference to the drawings annexed, and it is apparent that numerous variations or modifications may be made without departing from the true spirit and scope thereof, as set forth in the claims below. 

What is claimed is:
 1. An anchor base for heat sink of IC chipset, the anchor base being substantially a rectangular frame comprising: two opposite lateral stiles provided with respective lateral plates; a snap barb disposed on each lateral plate at its lower inner edge; the anchor base being characterized in: at least one longitudinal resilient rod being striding the other two opposite lateral stiles of the rectangular frame to get fixed; two ends of the longitudinal resilient rod being extended downwardly to form respective protruding rods, wherein the longitudinal resilient rod is longer than a heat sink to have the protruding rods located at positions out of the heat sink at least.
 2. The anchor base according to claim 1, wherein a relatively shorter resilient rod having its two ends extended downwardly and formed respective protrusions is intersected approximately perpendicular to the longitudinal resilient rod at a proper position in the rectangular frame. 